package com.itheima.service;

import com.itheima.pojo.Book;

import java.util.List;

public interface BookService {
    //quan bu
    public List<Book> findAll();
    //cha id
    public Book findById(Integer id);
    //zeng
    public boolean save(Book book);
    //shan
    public boolean delete(Integer id);
    //gai
    public boolean update(Book book);
}
